diff --git a/.github/workflows/docker-alpine-image.yaml b/.github/workflows/docker-alpine-image.yaml
index 3a91e0c..9fb9fcd 100644
--- a/.github/workflows/docker-alpine-image.yaml
+++ b/.github/workflows/docker-alpine-image.yaml
@@ -3,6 +3,7 @@ name: Build Alpine
 on:
     push:
         branches: [master]
+        tags: [v*]
     pull_request:
         branches: [master]
 
@@ -13,6 +14,15 @@ jobs:
       -
         name: Checkout
         uses: actions/checkout@v3
+      -
+        name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v4
+        with:
+          images: pikvm/ustreamer
+          tags: |
+            type=ref,event=tag
+            type=sha,format=long
       -
         name: Set up QEMU
         uses: docker/setup-qemu-action@v2
@@ -21,5 +31,41 @@ jobs:
         uses: docker/setup-buildx-action@v2
         with:
           driver-opts: image=moby/buildkit:master
-      - name: Build
-        run: docker buildx build --file pkg/docker/Dockerfile.alpine --platform linux/arm64,linux/amd64,linux/arm/v7 .
+      -
+        name: Build and export to Docker
+        uses: docker/build-push-action@v3
+        with:
+          context: .
+          load: true
+          tags: ustreamer
+          file: pkg/docker/Dockerfile.alpine
+      -
+        name: Test
+        run: |
+          echo version: $(docker run --rm -t ustreamer --version)
+          echo -e "features:\n$(docker run --rm -t ustreamer --features)"
+      -
+        name: Build multi arch
+        uses: docker/build-push-action@v3
+        with:
+          context: .
+          platforms: linux/arm64,linux/amd64,linux/arm/v7
+          file: pkg/docker/Dockerfile.alpine
+      -
+        name: Login to DockerHub
+        if: startsWith(github.ref, 'refs/tags/v')
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}          
+      -
+        name: Push
+        if: startsWith(github.ref, 'refs/tags/v')
+        uses: docker/build-push-action@v3
+        with:
+          context: .
+          platforms: linux/arm64,linux/amd64,linux/arm/v7
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          file: pkg/docker/Dockerfile.alpine
diff --git a/README.md b/README.md
index 8a844b6..06f008f 100644
--- a/README.md
+++ b/README.md
@@ -81,6 +81,36 @@ $ ./ustreamer \
 
 You can always view the full list of options with ```ustreamer --help```.
 
+# Docker (Raspberry Pi 4 HDMI)
+## Preparations
+
+Add following lines to /boot/firmware/usercfg.txt:
+```
+gpu_mem=128
+dtoverlay=tc358743
+```
+Check size of CMA:
+```bash
+$ dmesg | grep cma-reserved
+[    0.000000] Memory: 7700524K/8244224K available (11772K kernel code, 1278K rwdata, 4320K rodata, 4096K init, 1077K bss, 281556K reserved, 262144K cma-reserved)
+```
+If it is smaller than 128M add following to /boot/firmware/cmdline.txt:
+```
+cma=128M
+```
+Save changes and reboot.
+## Launch
+Set HDMI EDID (it is not saved between reboots):
+```bash
+$ wget https://raw.githubusercontent.com/pikvm/kvmd/master/configs/kvmd/tc358743-edid.hex
+$ sudo v4l2-ctl --device=/dev//dev/video0 --set-edid=file=tc358743-edid.hex --fix-edid-checksums --info-edid
+```
+Start container:
+```bash
+$ docker run --device /dev/video0:/dev/video0 -p 8080:8080 pikvm/ustreamer:latest
+```
+Then access the web interface at port 8080 (e.g. http://raspberrypi.local:8080).
+
 -----
 # Raspberry Pi Camera Example
 Example usage for the Raspberry Pi v1 camera: